<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>

  <style>
    * {
      margin: 0;
      padding: 0;
    }

    .box {
      display: flex;
      width: 100%;
      height: 300px;
      background-color: skyblue;
    }

    .left {
      width: 100px;
      /* height: 100%; */
      background-color: pink;
    }

    .right {
      flex: 1;
      align-self: flex-end;
      width: 100%;
      background-color: yellow;
    }
  </style>
</head>

<body>
  <div class="box">
    <div class="left">左边</div>
    <div class="right">右边的小时响应式,而且还得是靠底部而且还得是靠底部而且还得是靠底部,这个怎么设置啊</div>
  </div>
</body>

</html>